The union has also set its sights on former directors from struggling state-owned arms manufacturer Denel and power producer Eskom.
Dirk Hermann, chief operating officer of Solidarity, said the union would bring an application of business rescue against SAA and Minister of Public Enterprises Pravin Gordhan.
Hermann said it had planned to bring the application a year ago, but that former SAA chief executive Vuyani Jarana had made several promises to Solidarity to remedy the airline's dire financial position.
“However, these promises have not been met and Jarana has left. We must protect sustainable work at SAA. We saw at Denel what happened to employees if the wait on a business rescue application is too long,” said Hermann.